Extend topology with SetDisplayConfig function

agastal · 05-22-2019, 12:48 PM

I can't extend two duplicate Displaylink monitors programmatically.

Normally to extend two monitors just a system call is needed, but with two Displaylink monitors duplicated, it doesn't work.

The function SetDisplayConfig does not work:
SetDisplayConfig(0, NULL,0, NULL,(SDC_APPLY | SDC_TOPOLOGY_EXTEND));

The manual operation in Windows Settings works correctly but by code (C or C++ or C#) it is impossible to extend two duplciate monitors.

Has anyone already had this problem?

05-22-2019, 12:48 PM	#1
agastal Junior Member Join Date: May 2019 Posts: 1	Extend topology with SetDisplayConfig function I can't extend two duplicate Displaylink monitors programmatically. Normally to extend two monitors just a system call is needed, but with two Displaylink monitors duplicated, it doesn't work. The function SetDisplayConfig does not work: SetDisplayConfig(0, NULL,0, NULL,(SDC_APPLY \| SDC_TOPOLOGY_EXTEND)); The manual operation in Windows Settings works correctly but by code (C or C++ or C#) it is impossible to extend two duplciate monitors. Has anyone already had this problem?